This will be followed by improvements to Quick match which will be announced this summer.

Previously they mentioned their intention to revamp hero classes and to force more standard comps for quick match. Their plan at that time was that it'd require 1 tank-warrior, 1 healer and 1 assassin, and 2 flex picks. Pending testing and the queues not erupting in molten lava, initially this will be the new standard for the vast majority of QM compositions.

The plan then is to follow up on this change by adding more incentives for queuing as roles that are currently underrepresented in the matchmaking queue which will then make this a hard requirement for every team.